Means preventing simultaneous operation of carriage return and any other carriage control function



Aug. 23, 1966 Original Filed Oct. 29

0. KRAUSS ETAL MEANS PREVENTING SIMULTANEOUS OPERATION OF CARRIAGE YOTHER CARRIAGE CONTROL FUNCTION RETURN AND 4 Sheets-Sheet l INVENTORSOlzo Kraafl min/rid link an 6rd (12 Aug. 23, 1966 KRAUSS ETAL ,2 ,051MEANS PREVENTING SIMULTANEOUS OPERATION OF CARRIAGE ANY OTHER CARRIAGECONTROL FUNCTION Original Filed 001;. 29, 196

RETURN AND 4 Sheets-Sheet 2 INVENTOR$ 061a vVr-aqr;

3. 1966 o. KRAUSS ETAL 3,268,051

MEANS PREVENTING SIMULTANEOUS OPERATION OF CARRIAGE RETURN AND ANY OTHERCARRIAGE CONTROL FUNCTION Original Filed Oct. 29, 1962 4 Sheets-Sheet 5FIG. 4

INVENTORS BY fiM/redL/nk L aonflard 16 1114 Aug. 23, 3966 o. KRAUSS ETAL3, 68,05

MEANS PREVENTING SIMULTANEOUS OPERATION OF CARRIAGE RETURN AND ANY OTHERCARRIAGE CONTROL FUNCTION Original Filed Oct. 29, 1962 4 Sheets-Sheet 4INVENTORS Z 0155b I QJQCS BY Manfred l/h d Lean 4rd Afr-w United StatesPatent 3,268,051 MEANS PREVENTING SIMULTANEOUS OPERA- TION OF CARRIAGERETURN AND ANY OTHER CARRIAGE CONTROL FUNCTION Otto Krauss and ManfredLink, Nurnberg, and Leonhard Kraus, Cohnrg, Germany, assignors to MaxGrundig, Furth, Bavaria, Germany Continuation of application Ser. No.233,528, Oct. 29, 1962. This application Dec. 27, 1965, Ser. No. 517,525Claims priority, application Germany, Oct. 27, 1961, G 33,444 17 Claims.(Cl. 197-65) This is a continuation application of our copendingapplication Serial No. 233,528, filed October 29, 1962.

The present invention relates to a paper carriage return controlarrangement, and more particularly to apparatus for preventing anydisturbance of the return movement of the paper carriage of a businessmachine by the untimely actuation of carriage control means, which areintended to be operated only when the carriage is at a standstill, andunder no circumstances while the carriage performs the return movement.

For example, when the carriage return key of an electric typewriter isactuated, the carriage is returned to a starting position while theescapement pawl is released. If during such return movement, theoperator actuates, for example, the back spacing key, the back spacingpawl will engage the rack bar of the paper carriage and interfere withthe return movement. Carriage return movement is impeded in a similarmanner when the space bar or the tabulator key is operated during thereturn movement of the carriage.

Electric typewriters or other business machines can be in an operativecondition while they are disconnected from the source of voltage. Forexample, the plug may be taken out from the wall socket, or a fuse mayblow and disconnect the machine. When the machine is switched on in thiscondition, the keys can be manually operated, since the key lockingmeans is not energized. If in this inoperative condition of the machine,the carriage return key, and then the space bar or the back spacing keyis actuated, the carriage will be jammed when the current is againsupplied to the machine, and a repair of the machine by a skilledmechanic becomes necessary.

It is one object of the present invention to provide a fool proofbusiness machine in which no action by the operator can cause jamming ofthe paper carriage during the carriage return movement.

Another object of the present invention is to provide a carriage returncontrol arrangement by which the carriage is no longer driven to performa return movement when operator controlled means are placed in aposition engaging the carriage.

Another object of the present invention is to disconnect the carriagereturn drive means from the carriage when the same is engaged by anelement mounted on-the stationary frame of the machine, or when suchelement is moved toward a position engaging the carriage.

Another object of the present invention is to provide a business machinein which the actuation of the back spacing means, of the space bar, orof the tabulator during a carriage return movement cannot cause blockingor jamming of the carriage.

Another object of the invention is to provide means for disengaging acoupling between drive means and the paper carriage when the backspacing means, the space bar, or the tabulator means are in an operativeposition.

With these objects in View, the present invention relates to a carriagereturn control arrangement which is particularly applied to businessmachines, such as electric typewriters or accounting machines having apaper car- Patented August 23, 1966 riage which moves in one directionduring typing operations, and in an opposite return direction undercontrol of a carriage return key. One embodiment of the inventioncomprises carriage return means having an inoperative condition, and anoperative condition for moving the carriage of the machine in a returndirection from one end position to the other end position thereof; andat least one carriage control means, such as a back spacing means or aspacing means, movable between an inoperative position, and an operativeposition engaging the carriage.

In accordance with the present invention, the carriage control means isconnected with the carriage return means in such a manner that the sameare rendered inoperative when the carriage control means is moved to itsoperative position in which it would impede the carriage returnmovement. Consequently, the carriage is not driven by the carriagereturn means when engaged by the carriage control means, for example, bythe pawl of the back spacing means.

In the preferred embodiment of the invention power operate-d carriagedrive means are connected by coupling means with the carriage means, andthe coupling is disengaged when the carriage control means is actuatedby the operator to move to the operative position in which it is adaptedto engage the carriage and to impede its movement. When the carriagereturn movement is desired by the operator, the coupling is moved to itscoupling position so that the carriage is driven to return to itsstarting position.

In one embodiment of the invention coupling means are provided whichtend to move to a disengaged position, and locking means are providedfor locking the coupling in the coupling position. The operatorcontrolled carriage control means is connected with the locking means torelease the same, when actuated, so that the coupling meansautomatically returns under the action of a spring to the disengagedposition in which the carriage is no longer driven by the continuonuslyoperating power operated carriage drive means.

The novel features which are considered as characteristic for theinvention are set forth in particular in the appended claims. Theinvention itself, however, both as to its construction and its method ofoperation, together with additional objects and advantages thereof, willbe best understood from the following description of specificembodiments when read in connection with the accompanying drawings, inwhich:

FIG. 1 is a fragmentary side elevation of a preferred embodiment of theinvention;

FIG. 2 is a fragmentary plan view of the embodiment of FIG. 1;

FIG. 3 is a fragmentary perspective view illustrating on an enlargedscale a mechanism forming part of the embodiment of FIGS. 1 and 2;

FIGS. 4, 5, and 6 are fragmentary side elevations illustratingsuccessive operational positions of the mechanism;

FIG. 7 is a fragmentary plan view illustrating a back spacing devicewhose operation influences the operation of the carriage return controlarrangement illustrated in FIGS. 1 to 6;

FIG. 8 is a fragmentary perspective view illustrating a tabulator deviceinfluencing the operation of the carriage return control arrangementillustrated in FIGS. 1 to 6; and

FIG. 9 is a fragmentary plan view illustrating a margin stop arrangementinfluencing the operation of the carriage return control arrangementillustrated in FIGS. 1 to 6.

Referring now to the drawings, and more particularly to FIGS. 1, 2 and3, on a side wall 1 of the machine frame, a coupling 2 is mounted whichincludes a wheel 3 driven by a belt, not shown, from an electric motor,not shown, to continuously rotate as long as the machine is switched on.The coupling has a coupling position in which wheel 3 is coupled with apulley 4 on which a band or cord, not shown, is wound up during rotationof pulley 4. The end of the band or cord is connected in a conventionalmanner to the paper carriage, not shown, of the machine, which may be anelectric typewriter or any other business machine; so that the carriageis moved in a return movement from the left to the right when coupling 2is in its coupling position.

A notch in a stationary bracket 1a is engaged by the edge 5 of arockable member 6 carrying an adjustable screw 7 whose head abuts aplate 8 connected by resilient elements 8a to the shiftaible wheel 3 ofthe coupling means 2. The free end of member 6 is connected by pivot 9to an angular lever 10 mounted for turning movement on a pivot 11 whichis secured to the stationary frame of the machine. When lever 10 isturned in counterclockwise direction as indicated by the arrow g,coupling 2 is shifted to its coupling position, and a carriage returnmovement is started. However, a spring 6a secured to member 6 urges thesame and lever 10 to the position illustrated in solid lines in FIG. 2in which coupling 2 is disengaged.

A shiftable slide member 12 has a hook-shaped end portion 12a passinginto a cutout 10a of lever 10. The other end of the shiftable slidemember 12 has an elon gated slot 13 into which a pin 14 of a three-armedlever 15 passes which is tumably mounted on a stationary stud 16. Theconnection 13, 14 constitutes a lost-motion device between members 15and 12. An operator controlled bar 18 is turnably connected with the endof arm 17 of lever 15. Bar 18 is connected through another lever, notshown, to the carriage return key, and is shifted in a conventionalmanner in the direction of the arrow [1 when the carriage return key isactuated by the operator who desires to start a carriage returnmovement.

A spring 18a connects the end of the operator influenced bar 18 with arm19 of lever 15. Another spring 20 is also connected to arm 12 and to astationary frame part to urge lever 15 to turn in counterclockwisedirection to the position illustrated in FIG. 1 in which the end of arm19 abuts an adjustable stop 21 on the frame of the machine. By theposition of lever 15, the normal position of bar 18 is determined, butwhen the :bar 18 is shifted to the left in the direction of the arrow a,lever 15 will turn in the direction of the arrow b while arm 19 movesaway from step 21. Since pin 14 abuts one end of slot 13, slide 12 isshifted in a direction of the arrow 0 when the carriage return keyeffects movement of the carriage return bar 18 in the direction of thearrow a. Angular lever 10 is turned in the direction of the arrow a tothe position illustrated in broken lines in FIGS. 2 and 4. Rockablemember 6 is angularly displaced, and shifts through members '7, 8 and 8acoupling means 2 to the coupled position so that the carriage returnmovement is started.

When lever 10 is turned in the direction of the arrow g, a link 38 isshifted which is connected to the escaper'nent mechanism so that thecarriage is released by the escapement pawl when the return movement isstarted by coupling 2 in coupling position.

Several operator controlled bars extend parallel to the carriage returnbar 18. Bar 24 is shifted when the back spacing key, not shown, isactuated by the operator, bar 23 is shifted when the space bar, notshown, is actuated, and bar 22 is shifted when the tabulator key, notshown, is actuated. Each of bars 22, 23, 24 is shiftable in thedirection of the arrow a to operate a means which engages the carriage.

Referring now to FIG. 7, bar 24 is pivotally connected to a lever 218whose other end is articulated to a member 217 so that the same isshifted when bar 24 is shifted by the back spacing key. Member 217 turnsa lever 215 about the pivot 214 so that a link 209 is shifted anddisplaces a cam 206 secured thereto by a screw 213. Link 209 is guidedby a stationary pin 207 s-lidable in a slot 208 of link 209. When cam206 is shifted, the inclined cam face 206a urges a pin 205 to moveupward as viewed in FIG. 7 so that a back spacing pawl 204 is turnedabout a stud 202 which is slidable in a slot 203 in pawl 204. When pawl204 turns in counterclockwise direction about a stud 202 it assumes aposition engaging the teeth of rack bar 201 which is secured to thecarriage and moves with the same. Further movement of link 209 to theright will cause shifting of pawl 204 to the right, with stud 202sliding in slot 203 so that the carriage is shifted to the right withrack bar 201 causing a one step return movement of the carriage.

If the back spacing carriage control means shown in FIG. '7 are shiftedto the position in which pawl 204 engages ra-ck bar 201, a returnmovement of the carriage released by operation of the carriage returnhat 18, would cause jamming of the machine.

FIG. 8 shows in a simplified manner tabulating means controlled by thetabulator control bar 22 when the tabulator key is actuated. Tabulatorcontrol bar 22 is articulated to a double-armed lever 157 which isconnected by a link 154 to an angular lever 153. A spring 156 urgeslever 153 to turn in a clockwise direction as viewed in FIG. 8 and topull down a tabulator stop member 152. When tabulator control means 22is actuated by the op erator, member 152 is raised to a position locatedin the path of movement of a tabulator stop 150 which is set in a slotof a member 151 secured to the carriage of the machine. A series oftabulator stops 150 is provided, and each tabulator stop can be set toan operative position in which a portion thereof moves together with thecarriage along a path in which tabulator member 152 is located in itsraised blocking position. It is evident that tabulator member 152 in itsblocking position will interfere with the carriage return movement ifthe operator actuates tabulator control bar 22 during the returnmovement of the carriage.

It will be understood that actuation of the spacing control bar 23 willcause engagement between an escapernent pawl and a rack bar on thecarriage, which is undesired during the carriage return movement.

The operator controlled bars 22, 23, 24 have cam projections 25, 26 and27, respectively, which cooperate with a linkage rod 28 extendingbetween the legs of a U-shaped linkage bridge member 28' mounted forturning movement on a shaft 29. A connecting rod 30 extends betweenbridge membcr 28', and a .U-shaped member 31 which is also turnableabout a shaft 32 mounted in the frame. One leg 33 of the U-shaped member31 has at its free end a shoulder 34 cooperating with the angular lever10. An arm 35 transversely projects from leg 33, and is connected to alinking wire 36 to a margin stop device as shown in FIG. 9.

Linking wire 36 is connected to a slide which is guided on a pair ofpins 102 and 103 projecting into a pair of slots 101 and 102. An angularlever 107 is turnable about a shaft 108 and is biased by spring 109. Atransverse projection 106 cooperates with the abutment of slide 100,while the arm 110 is connected by a link 111 to a double-armed lever 113turnable about a stud 112. One end portion of lever 113 engages the arm114 of a U-shaped member 116 mounted on a guide rod for slidingmovement. A projection 117 of member 114 moves in the region of aprojection 118 of an adjustable margin stop mounted on the margin bar119. Members 119 and 120 form part of the paper carriage of the machineand move with the same.

Operation When the operator influenced bar 18 is shifted in thedirection of the arrow a by operation of the carriage return key, notshown, lever 15 turns in the direction of the arrow b and shifts slidemember 12 in the direction of the arrow c so that angular lever 10 turnsabout its axis 11 from the position shown in solid lines in FIGS. 2, 3and 4 to the position shown in broken lines in FIGS. 2 and 4 and insolid lines in FIG. 5. In the position best seen in FIG. 4, spring 37urges member 31 to turn in the direction of the arrow :1, but since arm33 abuts lever 10, such turning is not possible until lever 10 isdisplaced to the position of FIG. 5. As soon as lever 10 has passedshoulder 34 of arm 33, member 31 turns a small angle to the position ofFIG. 5 so that angular lever 10 is locked in this position. Bridgemember 28 is turned a corresponding angle about shaft 29 so that thecross rod 28 is lowered and located directly opposite the camprojections 25, 26, 27 of the control bars 22, 23, 24.

The connecting wire 38 is shifted by the angular lever 10, and withdrawsthe escapment pawl, not shown, from the rack bar of the carriage so thatthe carriage is free to move. Turning of angular lever 10 to theposition shown in broken lines in FIG. 2 causes turning of member 6, andshifting of the power driven wheel 3 of coupling 2 in axial direction sothat pulley 4 is coupled to the power drive and is turned to move thecarriage in the return direction by winding up a belt or cord, notshown, secured to the carriage in a conventional manner. The carriagemoves now in the return direction.

When the carriage return key, not shown, is released by the operator inthe conventional manner, spring 20 turns lever 15 in counterclockwisedirection opposite to the direction of the arrow b so that bar 18 isreturned to the right to its initial position. Since pin 14 of lever 15moves in slot 13 of slide 12, lever 15 can turn opposite to thedirection of the arrow b without actuating or shifting slide 12.Consequently, slide 12 does not exert any shifting force on angularlever 10 which is still locked by engagement with shoulder 34.Therefore, the coupling 2 remains in coupled position and the carriagecontinues its return movement when the operator influenced bar 18 isreleased.

Referring again to FIG. 9, the toothed margin bar 119 and the leftmargin stop 120 move in the direction of the arrow b during the returnmovement of the carriage. In the end position of the carriage,projection 118 engages projection 117 and shifts member 116 to the rightas viewed in FIG. 9 so that the linkage 113, 111, 107 is operated toshift slide 100 so that connecting wire 36 is shifted in the directionof the arrow and turns member 31 in a direction opposite to the arrowfrom the position shown in FIG. to the position shown in FIG. 6 so thatthe locking means 33, 34 release the operating lever of the couplingmeans 2, 3, 4, 5, 6, 7, 8, 8a, and 10. Springs 8a move the coupling 2 tothe disengaged position in which the drive wheel 3 no longer drivespulley 4 so that the carriage is no longer power driven, and stops.

The carriage return movement requires a certain time, and it is possiblethat an operator may actuate a carriage control device, such as the backspacing device, the space bar, or the tabulator means during the returnmovement of the carriage which would cause engagement between therespective device and the carriage against the driving force of thecarriage drive means, i.e. the motor driven wheel 3. In this mannerjamming of the carriage would occur, and parts may be damaged so thatrepairs would have to be carried out by a skilled mechanic.

However, when anyone of the operator controlled carriage control means22, 23, 24 is operated during the return movement of the carriage, therespective cam projection 25, 26, or 27 engages the cross rod 28 whichis located directly in front of cam projections 25, 26, 27 in theposition of FIG. 5 assumed by the parts during the return movement ofthe carriage. The respective cam projection acts on the linkage rod 28to turn linkage member 28 about shaft 29 in the direction of the arrow eto the position shown in FIG. 6 in which locking means 31, 33, 34 israised so that shoulder 34 is separated from lever 10 which controlscoupling 2, permitting coupling 2 to move to its disengaged positionunder the action of springs 8a. Consequently, the connection between thepower drive and the carriage is interrupted, and the carriage comes to astop by the action of the carriage control means engaging the carriage.For example, the back spacing stop 204 may engage the rack bar 201 ofthe carriage, as shown in FIG. 7, or the tabulator stop 152 may engage atabulator stop 15%, as shown in FIG. 8. When lever 10 returns to itsnormal position upon disengagement of coupling .2, the escapementmechanism is control-led by the linking wire 38 to advance theescapernent pawl to its normal position so that the carriage is stoppedwhich may take place before tabulato-r member 152 engages a tabulatorstop 150.

When the actuated operator controlled means 22, 23, or 24 is released bythe operator, it returns to its norm-a1 position under the action of aspring acting in a conventional manner on the respective operatorcontrolled key. Cross rod 28 slides off the top of the respective camprojection 25, 26, or 27 on which it was resting, and members 28 and 3 1turn under the action of spring 37 to the initial position shown in FIG.4 in which the coupling 2 is disengaged, and the locking means 3 1, 33,34 are released since arm 33 rests on lever 10 as best seen in FIGS. 3and 4. In addition to the advantage obtained 'by preventing anyaccidental jamming of the carriage by improper operation, thearrangement of the present invention can be used for purposelycontrolling and interrupting the return movement of the carriage. Forexample, if the carriage had arrived at the end of a line, and theoperator intends to indent the next following line to form a paragraph,the operator first actuates the carriage return means, and then operatesfor example, the space bar in the position of .the carriage in which heintends to stop the carriage return movement, so that the carriage stopsin a position corresponding to a new paragraph.

It will be understood that each of the elements described above, or twoor more together, may also find a useful application in other types ofcarriage return control arrangements differing from the types describedabove.

While the invention has been illustrated and described as embodied in amechanism for interrupting the power drive of the paper :carriage of abusiness machine when the paper carriage is engaged by a control meansactuated by the operator, it is not intended to be limited to thedetails shown, since various modifications and structural changes may bemade without departing in any Way (from the spirit of the presentinvention.

Without further analysis, the foregoing Will so fully reveal the gist ofthe present invention that others can be applying current knowledgereadily adapt it for various applications without omitting featuresthat, from the standpoint of prior art, fairly constitute essentialcharacteristics of the generic or specific aspects of this inventionand, therefore, such adaptations should and are intended to becomprehended within the meaning and range of equivalence of thefollowing claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. A carriage return control arrangement, comprising, in combination,carriage return means having an inoperative condition and an operativecondition for moving a carriage means in a return direction; meanspermanently urging said carriage return means to move from saidoperative to said inoperative condition thereof; manually controlledmeans for placing said carriage return means from said inoperative intosaid operative condition thereof; locking means having a lockingcondition for locking said carriage return means in said operativecondition, and a releasing condition in which said carriage return meansassumes under the action of said urging means said inoperative conditionthereof; a plurality of independent- 1y operable carriage control meanseach movable between an inoperative position and an operative positionfor engaging the carriage means so that return movement of said carriageis impeded; and mean-s operatively connecting each of said carriagecontrol means with said locking means to place the same in saidreleasing condit-ion when the respective carriage control means is movedto said operative position thereof engaging said carriage means wherebysaid carriage return means is moved by said urging means into saidinoperative condition thereof, so that said carriage means is not drivenby said carriage return means while engaged by said carriage controlmeans.

2. A carriage return control arrangement according to claim 1 whereinsaid carriage return means include continuously rotating carriage drivemeans, and coupling means movable between an inoperative position and acoupling position for connecting said carriage drive means with thecarriage means; wherein said manually controlled means are operativelyconnected with said coupling means for causing movement of the same tosaid coupling position; wherein said carriage control means include aback spacing pawl and an escapement pawl; and wherein the means whichconnect the carriage control means with the locking means include alinkage means operatively connecting each carriage control means withsaid coupling means to move said coupling means to said inoperativeposition when a carriage control means is moved to its operativeposition.

3. A carriage return control arrangement according to claim 2 whereinsaid locking means lock said coupling means in said coupling position;wherein said plurality of carriage control means include control membersadapted to be selectively actuated by an operator to move parallel toeach other, and a plurality of engaging members respectively operated bysaid control members between an inoperative position and an operativeposition for engaging the carriage means so that carriage returnmovement is impeded; and wherein said means which connect each carriagecontrol means with said locking means include a linkage member extendingacross said control members, and means connecting said linkage memberwith said locking means for operatively connecting each actuatedcarriage control means with said locking means to release said lockingmeans so that said coupling means moves to said inoperative position.

4. A carriage return control arrangement according to claim 3 whereinsaid locking means has a released position and a locking position; andwherein said linkage member is movable to and from a positioncooperating with said carriage control means and connected with saidlocking means so as to assume said operating position when said lockingmeans is in said locking position and said coupling means is in saidcoupling position.

5. A carriage return control arrangement according to claim 1 whereinsaid carriage return means include drive means, and coupling meanshaving a disengaged position and a coupling position for connecting saiddrive means with the carriage means; wherein said permanently urgingmeans include biasing means urging said coupling means to saiddisengaged position; wherein said manually controlled means areconnected with said coupling means for shifting the same to saidcoupling position to cause a carriage return movement; wherein saidlocking means automatically lock said coupling means in said couplingposition; wherein said plurality of carriage control means include aback spacing device and a tabulator device; and wherein upon release ofsaid locking means by any one carriage control means said coupling meansmove to said disengaged position whereby said drive means is separatedfrom said carriage means when the respective carriage control meansimpedes the return movement of the carriage means.

6. A carriage return control arrangement according to claim 5 includingshiftable lever means operatively connected with said coupling means formoving the same between said position; wherein said manually controlledmeans are operatively connected with said lever means for shifting thesame; and wherein said carriage control means respectively includeengaging means for engaging the carriage means, and a control barshiftable to and from an actuated position for moving the respectiveengaging means to a position engaging the carriage; and including a rodextending transversely to said control bars so as to be engaged anddisplaced by the same during movement to said actuated position foreffecting release of said locking means whereby said coupling means moveto said disengaged position.

7. A carriage return control arrangement according to claim 1 whereineach of said carriage control means includes an engaging member movablebetween an inoperative position and an operative position engaging thecarriage means so that return movement is impeded, and a control membermovable for operating said engaging member and having a cam portion; andincluding a linkage member cooperating with all said cam portions andbeing displaced when any one of said control members is operated toplace the correlated engaging members in said operative positionthereof, said linkage members being operatively connected with saidlocking means to place the same in said releasing condition when saidlinkage member is displaced.

8. A carriage return control arrangement according to claim 7 whereinsaid carriage control means include a back spacing device, an escapementpawl adapted to be operated by a space bar, and a tabulating member.

9. A carriage return control arrangement comprising, in combination,carriage drive means; a coupling having a disengaged position and acoupling position for connecting said carriage drive means with acarriage for moving the same in a return direction; shiftable levermeans operatively connected with said coupling for moving the samebetween said positions; spring means urging said coupling with saidlever means into said disengaged position; operator influenced meansoperatively connected with said lever means for shifting the same toelfect movement of said coupling to said coupling position to cause acarriage return movement; spring-loaded locking means for locking saidlever means in a shifted position in which said coupling means is insaid coupling position; and a plurality of carriage control meansrespectively including engaging means for engaging the carriage, and acontrol bar for shifta'ble movement to and from an actuated position formoving the respective engaging means to a position engaging thecarriage; and linkage means operatively connected with said lockingmeans and including a turnable linkage member having a rod extendingtransversely to said bars so as to be engaged and displaced by each ofsaid bars during movement to said actuated position so as to effectshifting of said turnable linkage member, said linkage, and said lockingmeans and thereby shifting of said lever means to effect movement ofsaid coupling to said disengaged position whereby said carriage drivemeans are separated from the carriage when one of said engaging meansengages the carriage and impedes a return movement of the same.

10. An arrangement as set forth in claim 9 wherein said operatorinfluenced means include an actuator bar shifta-ble between aninoperative position and an opera tive position, and lost-motion meansconnecting said ac tuator bar with said lever means so that saidactuator bar can return to said inoperative position upon release by theoperator While said lever means is locked by said locking means tomaintain said coupling in said coupling position.

11. An arrangement as set forth in claim 10, wherein said lost-motionmeans include a turnable lever connected to said actuator bar and havinga pin, and a slide member engaging said lever means and having a slotslidably receiving said pin.

12. An arrangement as set forth in claim 9, wherein said locking meansincludes a turnable locking member having an arm formed with a shoulderengaging said lever means in one turned position of said locking memberand releasing the same in another t-urned position of said lockingmember, and being biased to assume said one turned position, said levermeans blocking said locking member in said other position when saidcoupling is in said coupling position; and a link connecting saidturnable locking member with said turnable linkage member.

13. An arrangement as set forth in claim 9 and including a margin stopadapted to be mounted on the carriage, a shiftable margin member shiftedby said margin stop in a carriage end position, and a linkage connectingsaid shiftable margin member with said locking means so that the samereleases said lever means in the carriage end position whereby saidcoupling is disengaged.

14. An arrangement as set forth in claim 9 and including a linkageconnected to said lever means and operated by the same, said lastmentioned linkage being adapted to be connected with an escapementdevice so that the same is rendered inoperative when said lever meansplaces said coupling in said coupling position.

15. An arrangement as set forth in claim 9 wherein 10 said turnablelinkage member is U-shaped and has two legs connected by said rod, eachof said control bars having a cam projection slidably engaging said rodfor turning said linkage member.

16. An arrangement as set forth in claim 9 wherein said control bars arerespectively adapted to be operated by a back-spacing device, a spacebar, and a tabulator device.

17. An arrangement as set forth in claim 9 and including a supporthaving a notch; and wherein said lever means include an angular levercooperation with said locking means, and a spring-loaded lever having anedge mounted in said notch for turning movement and connecting saidangular lever with said coupling.

References Cited by the Examiner UNITED STATES PATENTS 1,567,590 12/1925Hart 197--65 1,609,943 12/1926 Hart 19765 1,824,099 9/1931 Pit'man197176 ROBERT E. PULFREY, Primary Examiner.

EDGAR S. BURR, Assistant Examiner.

1. A CARRIAGE RETURN CONTROL ARRANGEMENT, COMPRISING, IN COMBINATION,CARRIAGE RETURN MEANS HAVING AN INOPERATIVE CONDITION AND AN OPERATIVECONDITION FOR MOVING A CARRIAGE MEANS IN A RETURN DIRECTION; MEANSPERMANENTLY URGING SAID CARRIAGE RETURN MEANS TO MOVE FROM SAIDOPERATIVE TO SAID INOPERATIVE CONDITION THEREOF; MANUALLY CONTROLLEDMEANS FOR PLACING SAID CARRIAGE RETURN MEANS FROM SAID INOPERATIVE INTOSAID OPERATIVE CONDITION THEREOF; LOCKING MEANS HAVING A LOCKINGCONDITION FOR LOCKING SAID CARRIAGE RETURN MEANS IN SAID OPERATIVECONDITION, AND A RELEASING CONDITION IN WHICH SAID CARRIAGE RETURN MEANSASSUMES UNDER THE ACTION OF SAID URGING MEANS SAID INOPERATIVE CONDITIONTHEREOF; A PLURALITY OF INDEPENDENTLY OPERABLE CARRIAGE CONTROL MEANSEACH MOVABLE BETWEEN AN INOPERATIVE POSITION AND AN OPERATIVE POSITIONFOR ENGAGING THE CARRIAGE MEANS SO THAT RETURN MOVEMENT OF SAID CARRIAGEIS IMPEDED; AND MEANS OPERATIVELY CONNECTING EACH OF SAID CARRIAGECONTROL MEANS WITH SAID LOCKING MEANS TO PLACE THE SAME IN SAIDRELEASING CONDITION WHEN THE RESPECTIVE CARRIAGE CONTROL MEANS IS MOVEDTO SAID OPERATIVE POSITION THEREOF ENGAGING SAID CARRIAGE MEANS WHEREBYSAID CARRIAGE RETURN MEANS IS MOVED BY SAID URGING MEANS INTO SAIDINOPERATIVE CONDITION THEREOF, SO THAT SAID CARRIAGE MEANS IS NOT DRIVENBY SAID CARRIAGE RETURN MEANS WHILE ENGAGED BY SAID CARRIAGE CONTROLMEANS.